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Basile [38]
3 years ago
7

Determine whether the situation calls for a survey, an observational study, or an experiment.

Mathematics
1 answer:
Elis [28]3 years ago
4 0

Answer:

b. observational study

Explanation:

Observational studies are <em>commonly used in order to know the effects of a treatment or drug. </em>This study recruits people (the population of interest) to participate and these people are then interviewed and observed on a face-to-face visit. This allows clinical investigation regarding the safety of the new medication, including its <u>side effects and adverse effects.</u> So, this allows the researcher to know the symptoms of the new drug including whether it can reduce migraine to people.

The study also allows the employment of different designs, thereby paving way to a better patient care.

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Help really need help with this
Ray Of Light [21]

Answer:

The answer is at 8:00 o’clock.

Step-by-step explanation:

So the Martinez family started 30 min after the Smith’s family. Smith’s family started one hour before Carson’s family. So it means the Smith’s family started at 7:30 and Martinez family started 30 min later. It means at 8:00 o’clock.

5 0
3 years ago
A plane flying horizontally at an altitude of 3 mi and a speed of 440 mi/h passes directly over a radar station. find the rate a
Licemer1 [7]
The distance is increasing at a rate that is the speed of the plane multiplied by the cosine of the angle between its flight path and the direct line to the radar station. That cosine is 4/√(3²+4²) = 4/5, so the distance is increasing at
  440 mi/h × 4/5 = 352 mi/h
8 0
3 years ago
Find the value of c that makes z2 - 5z + c a perfect square trinomial.
pogonyaev

Answer:

  • c = 6.25

Step-by-step explanation:

<u>Given trinomial:</u>

  • z² - 5z + c

<u>Complete square:</u>

  • z² - 2*2.5*z + 2.5² + c - 2.5² =
  • (x - 2.5)² + c - 6.25

<u>The value of c:</u>

  • c - 6.25 = 0
  • c = 6.25
5 0
2 years ago
Which expression is equivalent to 6(3+0.05)?
Gnesinka [82]

\huge{\boxed{6(3)+6(0.05)}}

The distributive property shows that you need to multiply the 6 separately by each term in the parentheses. This means you multiply 6*3 and 6*0.05, then add them together to get 6*3+6*0.05, or in the terms of your answer choices, \boxed{6(3)+6(0.05)}.

6 0
4 years ago
Read 2 more answers
If an object is bought for rupees 90 and then sold for a loss of 15% how much was it sold for​
Mashutka [201]

Answer:

76.50

Step-by-step explanation:

We are given the fact that you bought an object for 90 dollars, and in which you sold said object for a loss of 15%, we are then asked how much would that object be sold for.

To find the answer, we need to subtract the original amount by the percent loss, so :

90 - 15%

15% of 90 is 13.5, therefore :

90 - 13.5

76.5

3 0
3 years ago
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